2015 to present, Chair, Dept. of Animal and Food Sciences, University of Kentucky2012-2015, Director, University of Kentucky Research and Education Center2007 to present, Extension Professor, Dept. of Animal and Food Sciences, University of Kentucky2000-2007, Associate Extension Professor, Dept. of Animal and Food Sciences, University of Kentucky1994-2000, Assistant Extension Professor, Dept. of Animal and Food Sciences, University of Kentucky1990-1994, Senior Research Analyst, Dept. of Animal and Food Sciences, University of Kentucky1990-1994, Graduate Research Assistant, Dept. of Animal and Food Sciences, University of Kentucky1986-1990, Graduate Research Assistant, Dept. of Animal Science, Oklahoma State University